GHSA-7gwj-7fhm-vw4w — drupal/core
MEDIUMGHSA-7gwj-7fhm-vw4w is a medium-severity (CVSS 6.6) vulnerability in drupal/core. A fix is available for drupal/core — see the affected versions and patch details below.
Drupal core unrestricted file upload
Real-World Exposure
drupal/core🐘drupal/coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Drupal 8 core's file_save_upload() function does not strip the leading and trailing dot ('.') from filenames, like Drupal 7 did.
Users with the ability to upload files with any extension in conjunction with contributed modules may be able to use this to upload system files such as .htaccess in order to bypass protections afforded by Drupal's default .htaccess file.
After this fix, file_save_upload() now trims leading and trailing dots from filenames.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | drupal/core | ≥ 8.0.0&&< 8.7.11 | 8.7.11composer require drupal/core:^8.7.11 |
| 🐘Packagist | drupal/core | ≥ 8.8.0&&< 8.8.1 | 8.8.1composer require drupal/core:^8.8.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update drupal/core to 8.7.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7gwj-7fhm-vw4w is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-7gwj-7fhm-vw4w can be triaged on real exposure rather than presence alone.
Tailored to GHSA-7gwj-7fhm-vw4w. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-7gwj-7fhm-vw4w in your dependencies?
O3 Security finds GHSA-7gwj-7fhm-vw4w across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.